Lizard Island Sensor Relay Pole 2 (RP2)

A 6m galvanized pole has been deployed in the eastern part of the lagoon in behind Seabird Islet. The Relay Pole has three functions. The first is to propagate the wireless network through which the buoys talk and so it forms part of the network backbone talking directly to Relay-Pole 1. The second function is that a vaisala WXT520 weather station is mounted on the top and so this pole provides above water met observations. These include air temperature, humidity, air pressure, wind speed and direction and rainfall.The third function is that a sensor string is attached to the pole, the sensor string runs through a channel in Seabird Islet across the exposed seaward reef flat to the reef crest and then down the reef slope to around 20m. This gives a profile down the reef slope and gives readings of the water coming onto the reef complex.The pole has two Campbell Scientific loggers (one for the weather station, one for the sensors), spread-spectrum radio and 2.4/5 GHz 802.11 wireless for communicating with the base station (located at the workshop near the Research Station). The sensor string as of August 2010 has a SeaBird SBE37 at the end of the sensor string (around 230m out from the pole), and two SeaBird SBE39's located at teh reef crest and down at the start of the reef slope.The unit will be serviced every six months and will be used in the future for attaching new sets of sensors. The Pole is part of a larger deployment at Lizard Island consisting of four buoys and two relay-poles being deployed as part of the GBROOS Project. The design looks to measure the water within the lagoon as well as water impinging onto the reef and potentially any upwelling or movement of warm water that may cause thermal stress such as coral bleaching. The Relay Pole serves to form the network backbone using 2.4/5 GHz 802.11 wireless and Campbell 900 MHz spread spectrum radio's to communicate. The pole talks directly to RP1 on Plafrey Island which in urn talks to the base station at the research station. The pole also talks to buoys in its immediate range.The pole also houses a Vaisala WXT520 weather station and has an inductive modem / coupler that attaches inductive instruments to the pole. The inductive cable / sensor string runs east around Seabird Islet across the reef flat, down the reef crest into the reef front to around 20m.

在海鸟岛（Seabird Islet）后方的潟湖东部区域，部署了一根6米长的镀锌杆。该中继杆（Relay Pole）具备三项核心功能：其一，搭建无线通信网络以实现浮标间的数据交互，同时作为网络骨干的组成部分，可直接与中继杆1（Relay-Pole 1）通信；其二，杆体顶部安装有维萨拉WXT520气象站（Vaisala WXT520），可提供水面以上的气象观测数据，涵盖气温、相对湿度、气压、风速、风向及降雨量；其三，杆体挂载有传感器串（sensor string），该传感器串沿海鸟岛内部通道布设，经裸露的向海礁坪延伸至礁冠，随后沿礁坡下行至约20米水深处，可获取礁坡垂直剖面数据以及涌入礁体复合体的水体观测值。
该杆体配备两台坎贝尔科学公司数据采集器（Campbell Scientific），分别用于气象站与传感器的数据采集；同时搭载扩频无线电与2.4/5 GHz 802.11无线通信模块，用于与位于研究站（Research Station）附近车间内的基站进行通信。截至2010年8月，该传感器串末端（距杆体约230米处）搭载有海鸟SBE37传感器（SeaBird SBE37），另有两台海鸟SBE39传感器（SeaBird SBE39）分别布设于礁冠及礁坡起始段。本装置每半年将接受一次维护，未来可用于挂载新的传感器组。
该中继杆是蜥蜴岛（Lizard Island）更大规模部署项目的组成部分，该项目包含4台浮标与2根中继杆，作为大堡礁区域海洋观测系统项目（GBROOS Project）的实施内容之一。本部署方案旨在监测潟湖内部水体、涌入礁体的水体，以及可能引发珊瑚白化等热胁迫现象的上升流或暖水运移过程。该中继杆通过2.4/5 GHz 802.11无线通信与坎贝尔900 MHz扩频无线电实现组网，构成网络骨干；其可直接与普莱弗雷岛（Plafrey Island）上的中继杆1（RP1）通信，后者再与研究站的基站进行数据交互，同时可与通信范围内的浮标进行数据传输。该杆体还搭载有维萨拉WXT520气象站，以及用于将感应式仪器挂载至杆体的感应式调制解调器/耦合器。感应线缆/传感器串沿海鸟岛东侧绕行，穿过礁坪，经礁冠下行至礁前区域约20米水深处。